9.
    发明专利
    未知

    公开(公告)号:DE1659608A1

    公开(公告)日:1971-10-21

    申请号:DE1659608

    申请日:1967-12-20

    Applicant: BASF AG

    Abstract: 1,240,507. Fire resisting doors. BADISCHE ANILIN-& SODA-FABRIK A.G. 19 Dec., 1968 [20 Dec., 1967], No. 60333/68. Heading E1J. A fire resisting door has a frame work 1 of cement bound asbestos members with stiffening members 2 of strips of hardboard or wood-base material arranged crosswise to form cells and at least one thermally insulating layer 5 of cement bound asbestos and/or of alkali or sodium, silicate boards 6 containing glass fibres and water and which expand at temperatures above 250‹C and an outer metallic layer 7 of sheet steel or aluminium covering the layers 5 and/or 6 and secured thereto by an organic adhesive which looses its bonding properties to destroy the joint under the action of heat at temperatures of 60‹ to 400‹C e.g. epoxide resin and/or polyvinyl acetate and/or a copolymer of ethylene and vinyl acetate and/or acrylic ester, or by screws or rivets made of organic material such as mentioned above, or of Wood's metal or aluminium, or wood which are destroyed at the temperatures specified above, the edges of the door being covered with strips 8 of U- section aluminium. The gap between the strips 8 and the sheet steel plate 7 is filled with silicone rubber.

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